CVE-2026-104400

Deferred Deferred - Pending Action

BaseFortify

Publication date: 2026-10-05

Last updated on: 2026-10-06

Assigner: Patchstack

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins B Blocks b-blocks allows Stored XSS.This issue affects B Blocks: from n/a through 2.1.8.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-05

Last Modified

2026-10-06

Generated

2026-10-19

AI Q&A

2026-10-05

EPSS Evaluated

2026-10-18

NVD

CVE-2026-104400

EUVD

EUVD-2026-92287

Affected Vendors & Products

Vendor	Product	Version / Range
bPlugins	B	Blocks 0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the B Blocks WordPress plugin. It allows attackers to inject malicious scripts into web pages by exploiting improper input neutralization during page generation. The vulnerability exists in versions 2.1.8 and earlier.

Detection Guidance

Detecting this vulnerability requires checking the installed version of the B Blocks plugin. Use commands like 'wp plugin list' in WordPress or inspect the plugin directory for version details. Look for versions 2.1.8 or earlier.

Impact Analysis

Attackers could inject malicious scripts to steal visitor data or hijack accounts. Successful exploitation requires a privileged user to interact with a malicious link, crafted page, or form submission. The impact includes data theft and account compromise.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive user data, which may violate GDPR and HIPAA compliance requirements. Stored XSS attacks allow attackers to inject malicious scripts that steal visitor data or hijack accounts, potentially exposing personal or health information.

Mitigation Strategies

Immediately update the B Blocks plugin to version 2.1.9 or later. If updating is not possible, consider disabling the plugin temporarily or seek help from your hosting provider or web developer.

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